Honeywell R7426A, R7426B, R7426C dimensions Using the Schedules with RTC, only, Day1 Point

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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK

Using the Schedules (with RTC, only)

Two schedules, one for programming the schedule points and one for holiday programming, are available.

The standard schedule is used to switch the controller mode (off, night, standby or comfort) at programmed schedule points (S1 ... S6), which can be set for each weekday or weekday group as well as for several holiday types (H1, H2 and H3).

If the comfort or standby mode is taken from the schedule and if the occupancy switch is connected, the controller mode is determined by the occupancy input as follows:

Occupied (contact closed):

Controller mode = Comfort (sun - icon)

Unoccupied (contact open):

Controller mode = Standby (halfsun - icon)

The OFF and night controller modes are not influenced by the occupancy input.

Table 14 shows an example of the weekly schedule programmed with the following default values:

Mo ... Su from 6:00 till 18:00 = Comfort mode

Mo ... Su from 18:00 till 6:00 = Night mode

The holiday schedule is used to program each day of the year (01.01 ... 31.12.) as a holiday (day type = H1, H2 or H3) or as

a normal day (day type = H0 is default). The function is described as follows:

H0: no holiday - the weekday schedule applies

H1: free programmable as for a weekday, but only valid for the current day.

H2: as H1 function - free programmable, additional holiday type, e.g. last or first day after a longer holiday period. NOTE: After day is passed, day type (H1 or H2) is reset at 24:00 to normal.

H3: free programmable as for a weekday, but is valid every year and repeated annually.

The schedule points of the used holiday types (H1, H2 or H3) must be programmed in the standard schedule. Table 15 shows a programmed example of the holiday schedule (2.7. till 28.7. = holiday type H1 and 1.5. = holiday type H3).

The H1 and H2 holidays will not be influenced if the user changes the actual date. If power supply is interrupted for more than one day, all H1 and H2 holidays within the date of power supply error and the actual date will be deleted.

 

day1)

 

 

point 1

 

 

point 2

 

 

point 3

 

 

point 4

 

point 5

 

 

point 6

 

 

 

 

time

 

SMode2)

 

 

time

 

SMode2)

 

 

time

 

SMode2)

 

 

time

 

SMode2)

 

time

 

SMode2)

 

 

time

 

SMode2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mo

6:00

 

comfort

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

18:00

 

night

 

Tu

6:00

 

comfort

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

18:00

 

night

 

We

6:00

 

comfort

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

18:00

 

night

 

Th

6:00

 

comfort

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

18:00

 

night

 

Fr

6:00

 

comfort

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

18:00

 

night

 

Sa

6:00

 

comfort

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

18:00

 

night

 

Su

6:00

 

comfort

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

18:00

 

night

 

H1

0:00

 

off

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

 

H2

0:00

 

off

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

 

H3

0:00

 

off

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

--:--

 

ignore

1)Weekday or holiday type; 2)Programmed controller mode (schedule mode)

Table 14. Example of weekly schedule and holiday types (default)

day

Jan.

Feb.

March

April

May

June

July

August

Sept.

Oct.

Nov.

Dec.

1.

H0

H0

H0

H0

H3

H0

H0

H0

H0

H0

H0

H0

2.

H0

H0

H0

H0

H0

H0

H1

H0

H0

H0

H0

H0

3.

H0

H0

H0

H0

H0

H0

H1

H0

H0

H0

H0

H0

4.

H0

H0

H0

H0

H0

H0

H1

H0

H0

H0

H0

H0

 

 

 

 

 

 

 

 

 

 

 

 

 

28.

H0

H0

H0

H0

H0

H0

H1

H0

H0

H0

H0

H0

29.

H0

H01)

H0

H0

H0

H0

H0

H0

H0

H0

H0

H0

30.

H0

 

H0

H0

H0

H0

H0

H0

H0

H0

H0

H0

31.

H0

 

H0

 

H0

 

H0

H0

 

H0

 

H0

1)If the 29th of February is programmed to be a H1 or H2 holiday and the current year is not a leap year, this holiday will be deleted on March 1.

Table 15. Example of annual schedule (no default)

EN1B-0203GE51 R0507C

16

Image 16
Contents General Before Installation NoteMounting Wiring Power Supply and GroundingTerminal Connection Controller to CPA/SPA potentiometer TerminalConfiguration and Control Parameters Y1CTRF Soffs MinposNoffs Configuration Settings Control Point / Setpoint Adjustment Cpatyp C.05Operating Range Selection Ctrltyp C.04 Output Control Range Selection YRange C.06Output Signal Mode YMode C.11 Supply of Temperature Signal T2 T2ext C.12Limit Type LimTyp C.13 Sensor Type Senstyp C.14Parameter Settings Adjustment Reset Time tr1 / tr2 P.12 / P13 Throttling range and reset time reference Application SensThrottling Range Xpc / Xph P.10 / P11 Tr1 Tr2Night Mode Offset Noffs P.26 Controller with RTC only Start Point Ystart P.15Compensation Changeover Point Wcomp P.03 Summer / Winter Compensation Authority Su / Wi P.04 / P.05Operating Overview Return Air Offset RetOffs P.20Minimum Position Minpos P.14 Runtimex, x = Y1, Y2, or Y3 P.21...P.23Changing Operating Modes Operating overviewStandard display mode Time OutAdjusting Configuration / Parameter Values Resetting Param. Values to Default ValuesDisplaying Actual Values Selecting ParametersOutput Selection Mode Example of annual schedule no default Using the Schedules with RTC, onlyDay1 Point Selecting Clock and Schedules with RTC, only Adjusting Date and Time with RTC, onlyProgramming Standard Schedule with RTC, only Interpreting Error Messages Programming Holiday Schedule with RTC, onlyAnnual schedule Automation and Control Solutions Weekly schedule and holiday types

R7426C, R7426A, R7426B specifications

Honeywell's R7426 series comprises three advanced models: R7426B, R7426A, and R7426C. These devices are designed to optimize control for HVAC applications, emphasizing energy efficiency, ease of use, and superior control capabilities. Each model incorporates unique features and technologies catering to specific system requirements while maintaining common foundational characteristics.

The R7426B is engineered with a microprocessor-based control system, allowing for precise temperature management across varied environments. It supports a range of heating and cooling applications, making it versatile in both residential and commercial settings. The unit boasts dual-stage heating and cooling capabilities, ensuring optimal comfort by allowing for gradual temperature changes. It also includes an easy-to-read LCD display for user-friendly navigation and parameter adjustments.

R7426A enhances functionality with additional communication technologies. This model incorporates Honeywell's proprietary communication protocols, enabling seamless connection with smart thermostats and home automation systems. This ensures users can monitor and control their HVAC systems remotely, leading to enhanced energy management and convenience. R7426A also includes advanced diagnostic capabilities that simplify troubleshooting and maintenance processes.

R7426C further extends the capabilities of the series by integrating state-of-the-art sensors for real-time environmental monitoring. These sensors continuously track indoor air quality parameters such as humidity and particulate matter levels, allowing for immediate adjustments to maintain optimal indoor conditions. The model is also equipped with smart algorithms that learn user preferences over time, automatically adjusting settings to enhance comfort and efficiency.

Common features across the R7426 series include robust construction for long-lasting performance and compatibility with a wide range of HVAC systems, including heat pumps and conventional heating systems. Each model supports programmable settings, enabling users to create schedules that align with their unique lifestyle or business needs. Safety features, including freeze protection and delay timers, are integrated to safeguard against potential system failures.

Overall, the Honeywell R7426B, R7426A, and R7426C models represent a significant advancement in HVAC control technology. With their focus on efficiency, automation, and user-centric design, these devices help users achieve optimal climate management in their spaces while minimizing energy consumption. Whether for residential comfort or commercial efficiency, these models stand out as reliable solutions in the HVAC market.